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        1. MEGS_Log version 3.3 Help

          1. Copyright notice and licence agreement

          2. How to contact MEGS_Log support

          3. What's new in MEGS_Log 3.3

          4. Concepts in MEGS_Log

            1. About boreholes, units and elements

            2. About geophysical traces

            3. About editing with the mouse and Editing Tools

            4. About Insert Modes

            5. About schemas

            6. About seams and plies

            7. About sample numbers

            8. About hatches

            9. MEGS_Log settings

            10. About the MEGS_Log configuration file

            11. About MEGS_Log licencing

          5. How to carry out common tasks within MEGS_Log

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About seams and plies

Each unit in a borehole can be assigned a seam and/or a seam and a ply. Within MEGS_Log this process is known as correlating.

The set of seams and plies available for correlation depends on the Site setting. Which seams and plies are present in a particular set depends on settings in the config file.

Seam and ply names follow a heirarchical structure. Each seam can have zero or more ply names associated with it. Seam names must be unique, however ply names can be common to several seams (they are regarded as separate plies).

MEGS_Log enforces the current seam/ply structure when correlating though MEGS_Log does not require selection of a ply for a seam that has plies associated with it.